Wattenberg, Ben J
The real America : a surprising examination of the State of the Union
Doubleday, 1974
 Buku Teks
Ahrens, L.H.
Distribution of the element in our planet
McGraw-Hill, 1965
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Ballard, Robert D.
Exploring our living planet
National Geographic Society, 1983
 Buku Referensi
Margulis, Lynn, 1938-
Symbiotic planet: a new look at evolution
Basic Books, 1998
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Novak, Brenda. author
Right where we belong = Dimana pun bersamamu
PT Gramedia Pustaka Utama, 2018
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